Antiskid chain



July 14, 1931. J. SENFT 1,814,639

ANTISKID CHAIN Filed May 31, 1950.

INVENTOR so into the tread Patented Jul 14, 1931 UNITED STATES PATENT OFFICE JOHN SENI'L', OI YORK, PENNSTLYANIA, ASSIGNOR TO UNITED STATES CHAIN & FORG- GOMPANY, OI PITTSBURGH, PENNSYLVANIA, A. CORPORATION OF DELAWARE m'rrsx n cnam Application filed May 31,

vide a chain which will have a maximum resistance to wear and hence increased life, for a given quantity of material.

Still another object of my invention is to provide a chain'of generally improved struc- (Mrs.

One form which my invention may take is shown in the accompanying drawing, wherein Figure 1 is a perspective view of a wheel e nipped with my anti-sln'd chain; Fig.

2U 2 is a p an view, on an enlarged scale, of a portion of one of the tread chains or cross chains of Fi 1; Fig. 3 is aside elevational view thereo and F1g. 4 is a view taken on the line IVIV of Fig. 2.

The chain structure is shown as applied to the tire of a motor vehicle wheel 5, and consists of a pair of side chains 6 which may be of the usual form, and cross chains 7. The cross chains are shown as composed of links so twisted approximately 90 in the usual manner, so that they may all lie in substantially a given plane, that is, that each will engage the roadway in approximately a flatw1se position so far as the twists of the link permit,

insteadof some of the links engagmg the roadway flatwise and others edgewise.

-As is well-known, the raised portions of the twisted links wear through rather rapidly in service, thus necessitatmg frequent relacements or repairs of the cross chains.

e purpose of this invention is to materially increase the life of the cross chains without addin greatly to the weight thereof, and at a sm 1 increase in cost of manufacture, as

.45 compared to the cost of various standard t es of anti-skid chains.

0 this end, I provide metal studs 8 and 9 which may be of a gau or thickness approximating the gau e o the material entering links or which may be of other 1830. Serial No. 458,661.

suitable material and of any desired thickness. By making the studs 8 and 9 from stock corresponding to that entering. into-the manufacture of the tread links 7, the lifeof the cross or tread chains is approximately doubled, since the studs or calks 8 and 9 must be H first worn through before their corresponding links become worn to any considerable extent.

The studs 8 and 9 are shownin the form of short bars which are welded or otherwise suitably secured to the raised portions of the links, and are of coursesecured to the outer sides of the links, so that they will have engagement with the roadway during traveling -movement of the wheel.

The diagonal arrangement of the studs with respect to their links not only facilitates placing of the studs in position upon the raised portions of the links, but tends to resist skidding. Usually, the tire chains are applied somewhat loosely so that when a given cross chain engages the roadway during rotation of the wheel, such chain will lie loosely upon the roadway with its links in non-symwith the calks.

I claim as my invention 1. An anti-skid cross chain composed of inter-connected links each twisted through approximately 90, and bar-like calks welded at their mid portions to those projecting per-- tions of the links which result from the twisting thereof, each calk extending in a direction diagonally to the longitudinal center line of its link, and extendin in both directions beyond the adjacent en of the underlying .llnk. K 2. An. anti-skid cross chain composed of interconnecting links each twisted to permit the said links to lie in approximately a common plane, and bar-like calks welded at their mid portions to the outer sides of the projecting portions of the links which result from the twisting thereof, the said calks lying in a plane substantially parallel to the plane of the links, and each calk extending in both directions beyond the end of the link underlying that link to which it is connected.

' In testimony whereof I, the said JOHN SEN'FT, have hereunto set my hand.

JOHN SENFT. 

